It might be a cliche, but sometimes, a picture says more than a thousand words. Over the years, I've often talked about how the technology world is iterative, about how products are virtually always built upon that which came before, about how almost always, multiple people independently arrive at the same products since they work within the same constraints of the current state of technology. This elementary aspect of the technology world, which some would rather forget, has been illustrated very, very well in one of Samsung's legal filings against Apple.

An iPhone or iPod Touch is like looking through a key hole in a door. An iPad is like opening up the door and walking inside. VERY different. The bigger screens gives the app maker room to do things in very different ways which makes it a very different experience.

Which my iPhone I pretty much only consume information.
With my iPad I create things every day. I'm able to do about 90% of what I used to do on a laptop. I definitely wouldn't be able to say that about my iPhone.